Phase transformations in U-2 wt% Zr alloy
DSpace at IIT Bombay
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Title |
Phase transformations in U-2 wt% Zr alloy
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Creator |
BASAK, CB
KESWANI, R PRASAD, GJ KAMATH, HS PRABHU, N |
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Subject |
uranium
system actinide alloys and compounds phase transitions x-ray diffraction sem |
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Description |
Phase transformation studies of uranium-2 wt% zirconium alloy have been carried out using optical microscopy, SEM with EDS, XRD and dilatometer as analytical tools for different heat treated samples. It is shown that at room temperature as-cast, step-cooled and annealed samples contain only super saturated alpha phase instead of equilibrium alpha and delta phase. However, morphology of the alpha phase gets changed with the thermal history. Water quenched sample contains alpha' acicular martensite of orthorhombic structure, as confirmed by the XRD. Variation in the lattice parameters of alpha phase are calculated under different heat treated conditions. Thermodynamic calculations presented here show that there are two critical concentrations of zirconium which decide the way phase transition should proceed from the gamma phase field upon rapid cooling. Quenching dilatometry shows that there are two transitions while cooling the sample from 900 degrees C rapidly, which is in agreement with the thermodynamic calculations. (C) 2008
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Publisher |
ELSEVIER SCIENCE SA
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Date |
2011-07-28T15:41:34Z
2011-12-26T12:59:51Z 2011-12-27T05:52:50Z 2011-07-28T15:41:34Z 2011-12-26T12:59:51Z 2011-12-27T05:52:50Z 2009 |
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Type |
Article
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Identifier |
JOURNAL OF ALLOYS AND COMPOUNDS, 471(1-2), 544-552
0925-8388 http://dx.doi.org/10.1016/j.jallcom.2008.04.021 http://dspace.library.iitb.ac.in/xmlui/handle/10054/7439 http://hdl.handle.net/10054/7439 |
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Language |
en
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